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The average length of a prison term in the United States for white collar crime is 34.9 months. A random sample of 40 prison terms indicated a mean stay of 28.5 months with a standard deviation of 8.9 months. At α = .04, is there sufficient evidence to conclude that the average stay differs from 34.9 months?
a researcher reports an f-ratio with df 3 36 from an independent-measures research study.a. how many treatment
Forty percent of the time, sales are more than 470,000 and 10 percent of the time, sales are more than 500,000. What is the mean and standard deviation of the distribution?
Given the following frequency distribution, find out the mean, variance, and standard deviation.
a survey of 85 families showed that 36 owned at least one dvd player. find the 99 confidence interval estimate of the
Suppose the probability that a carton of eggs will contain at least one broken egg is 1/3. use a simulation of 20 trials to find the probability that the next three cartons will contain only unbroken eggs.
The 5-step approach to hypothesis testing and an explanation of your decision to reject or fail to reject the null hypothesis.
montgomery peck and vining 2001 report on a study in which a rocket motor is formed by binding an igniter propellant
Containers of yogurt were inspected with regard to the number of days until they expire. 0 represents a yogurt container with today's date. The following table gives the frequency distribution of the number of day's expiry date. Prepare the relati..
For the following situation, assume the random variable is normally distributed and use a normal distribution or a t-distribution to construct a 90% confidence interval for the population mean. If convenient, use technology to construct the confid..
Determine the mean µ of X; and then find the first, second, and third moments of the distribution about the point µ.
Concept of statistical signi cance
What are the pros and cons of selecting an established theoretical or conceptual model or framework? What are the pros and cons of creating/developing your own?
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